Fig. 2.
Effects of fluoxetine (10 mg/kg) and uncontrollable tail shock stress on fixed-ratio 1 (FR-1) and fixed-ratio 2 (FR-2) escape performance. Fluoxetine was administered 1 h and tail shock 24 h prior to behavioral testing. Data are presented as a blocks of five escape trials and b the mean escape latency for all 25 FR-2 escape trials. Data represent means ± SEM. Asterisks p<0.05 relative to the saline group. The number in each bar represents the number of animals included in that group